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I've been told that home water softeners that don't use reverse osmosis replace the calcium, iron, and magnesium in the water with sodium. (1) is that correct? (2) if that is true, does that put so much sodium in the water that you shouldn't use it for drinking water? Bubba73 You talkin' to me? 21:01, 5 June 2013 (UTC)
I have seen classical fields being referred to as having a spin number, the classical electromagnetic field among them. As far as I can tell, this corresponds to the reciprocal of the period (in full cycles) of the effect of rotation on the field. The electromagnetic field is retored by a rotation of 2π (spin-1), and a gravitational field is restored by a rotation of π (spin-2). This seems to hold, extrapolated to QM fermion fields: a rotation of 4π (spin-1/2). Can anyone point me to the background of this concept in a classical setting? — Quondum 23:02, 5 June 2013 (UTC)
Science desk | ||
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< June 4 | << May | June | Jul >> | June 6 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
I've been told that home water softeners that don't use reverse osmosis replace the calcium, iron, and magnesium in the water with sodium. (1) is that correct? (2) if that is true, does that put so much sodium in the water that you shouldn't use it for drinking water? Bubba73 You talkin' to me? 21:01, 5 June 2013 (UTC)
I have seen classical fields being referred to as having a spin number, the classical electromagnetic field among them. As far as I can tell, this corresponds to the reciprocal of the period (in full cycles) of the effect of rotation on the field. The electromagnetic field is retored by a rotation of 2π (spin-1), and a gravitational field is restored by a rotation of π (spin-2). This seems to hold, extrapolated to QM fermion fields: a rotation of 4π (spin-1/2). Can anyone point me to the background of this concept in a classical setting? — Quondum 23:02, 5 June 2013 (UTC)